Well if we are talking about 'sure things'....death and taxes
You can have an illegal vehicle any day of the week. Bulbs blow, license plate lights fail, tires wear out, smog equipment fails, mufflers fall off, seat belts malfunction any number of maladies can render you 'illegal' without even trying.
James and Colleen Tucker.
Aut viam inveniam aut faciam
Beat our time, Los Angeles to Ushuaia 70 days